With Star Wars: The Bad Batch releasing in under a week, here is everything you need to know about The Delta Squad from Star Wars: Republic Commando and the Clone Wars. Clone Sergeant RC-1138 Boss, Second-in-command RC-1140 Fixer, RC-1262 Scorch and finally RC-1207 Sev.
So our first canon glimpse at the Elite Delta squad came from the Clone Wars episode, Witches of the mist, where the unit was called upon in the aftermath of Savage Opress’ brutal massacre on the planet Devaron. Savage, who is Maul’s brother, savagely killed Jedi General Master Halsey, along with his Padawan Knox, who were defending the sacred Temple of Eedit, which was a very sacred site to the Jedi Order, because it was constructed over a large vergence in the force. Regardless, this quickly captured the attention of the Jedi council very soon after.